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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Prediction of Chloride Penetration Depth Rate and Diffusion Coefficient Rate of Concrete from Curing Condition Variations due to Climate Change Effect
Author(s): Tae-Kyun Kim, Seung-Jai Choi, Ji-Hun Choi and Jang-Ho Jay Kim
Appears on pages(s):
Keywords: climate change, chloride diffusion coefficient rate, Satisfaction Curve (SC), performance based evaluation (PBE)
Abstract:Recently, many countries including Korea are experiencing serious climatic events, such as heat waves, torrential rain,
cold waves, heavy snowfall, and typhoons. In addition, due to the extreme climate events, the construction period of
concrete structures tends to be extended, whereby increasing related economic losses. Pushing through construction
projects without considering climate change results in low-quality concrete, causing poor constructions humans and
consequent casualties and property damages. Moreover, exposure of concrete structures to extreme environmental
conditions that involve carbonation, freezing and thawing and to chloride attack environments may reduce the
durability of concrete. In the environments of carbonation and chloride attack, concrete structure cured in inadequate
curing conditions develops cracks, making it easy for CO2 and chloride to and corrode rebars and reducing
durability of concrete. Also, in the environments of repeated freezing and thawing, the inadequately cured concrete
develops microcracks through which water infiltrates, resulting in decline in performance. According to the study
results, durability generally declines most rapidly in the chloride attack environment among various environmental
types. Therefore, to address these issues and provide measures for climate change, this study investigated the effect of
climate factors on strength and chloride diffusion coefficient rate of concrete structure by selecting sunlight exposure
time and wind speed as the most important curing conditions among various climate factors that affect concrete
performance. Regarding the analytical method of experimental results, performance based evaluation (PBE) on concrete
strength and durability using Satisfaction Curve is proposed. In addition, the PBEs used in this study are applied
to future climate scenarios. It is expected that the optimal mix ratio accounting for climatic change in concrete mixing
can be derived using the future climate change scenario.
IJCSM, International Partner Access.
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